What's the PP disposable snack box filler masterbatch? Its a kind of filler masterbatch using the talc powder as the filler, and pp as the carrier to help to reduce the production cost. Talc filler masterbatch is a kind of plastic modified filler. It refers to the talc which is mainly...
Its a kind of filler masterbatch using the talc powder as the filler, and pp as the carrier to help to reduce the production cost.
Talc filler masterbatch is a kind of plastic modified filler. It refers to the talc which is mainly composed of talc powder and is mixed with polymer or other carrier. It is mainly used for the improvement of properties such as rubber plastic resin, which can significantly improve the filling. Material stiffness, high temperature creep resistance, heat resistance and other properties.
Talc is an aqueous, silicate mineral with a layered structure. Chemical formula: Mg3(Si4O10)(OH)2. Its chemical composition: MgO is 31.8%, SiO2 is 63.37%, H2O is 4.7%, often contains a small amount of Fe, A1 and other elements. The density of talc is 2.7~2.8g/cm, the hardness is the smallest of mineral fillers, the Mohs hardness is 1, and it has a soft and smooth feel. Its color is white, gray green, milk white, light red, light blue, light gray, etc., with pearl or fat luster. The association water can be lost at 380~500 °C, and the crystal water is lost when it is above 800 °C. Talc is slightly alkaline in water and has a pH of 9.0 to 9.5.
The talc has a layered structure, and the adjacent two layers are combined by a weak van der Waals force. When an external force acts, the adjacent two layers are likely to slip or detach from each other. Therefore, the basic shape of the talc particle structure is flake or scale.
The flaky structure of talc powder has greatly improved some properties of talc-filler plastics. Some people regard talc as a reinforcing filler. First, talc can improve the stiffness of the filler material and the creep resistance at high temperatures. When the talc particles are arranged along the direction of material flow during processing, according to the principle of minimum resistance, the arrangement is basically in the form of a sheet, and the small pieces are connected into a large piece. Thus the material stiffness can be significantly increased in a particular direction. Secondly, talc powder can significantly improve the heat resistance of the filler material. The heat distortion temperature used to measure the heat resistance of a material refers to the temperature at which the sample is bent under a load to a certain extent, and the flaky talc powder can increase the heat distortion temperature of the material in a specific direction.
Among the silicon-containing fillers, talc is the cheapest and can reduce costs.
Polypropylene (PP) is a product of addition polymerization of propylene as a monomer under the action of a catalyst. It has excellent mechanical properties, non-toxicity, heat resistance, chemical resistance and processability, and is rich in raw materials and low in cost. Therefore, it is widely used in many fields and has become the fastest growing variety of the five general synthetic resins. However, PP is a partially crystalline resin. Under normal processing conditions, the crystallization rate is relatively slow, and it is easy to form larger spherulites. It is difficult to pass light through the entire product. Therefore, the transparency and gloss of the product are poor, and the appearance lacks aesthetics, which limits its application in the fields of packaging, medical equipment, household goods and the like. The anti-reflective modified PP retains its excellent properties while maintaining excellent transparency and gloss comparable to other typical transparent materials such as PC, PS, and PET. In particular, PP has a high heat-resistant deformation temperature, and is transparent to PP, microwave cups, baby bottles, medical syringes, etc., which are required for high transparency and need to be used or disinfected at high temperatures. The broader market prospects of other transparent materials have been rapidly developed at home and abroad.
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